[llvm-dev] [Release-testers] [8.0.0 Release] rc2 has been tagged (original) (raw)

Brian Cain via llvm-dev llvm-dev at lists.llvm.org
Tue Feb 12 16:38:26 PST 2019

Any tips or suggestions on how to isolate or identify this defect? It seems non-trivial to bisect this failure.

Hans: presumably this bug should block the 8.0 release?

On Mon, Feb 11, 2019 at 8:37 AM Brian Cain <brian.cain at gmail.com> wrote:

rc1 did not exhibit this mismatch. A repeat of the rc2 build repeated the mismatch. I diff'd the disassembly between phase 2 and phase 3 and the difference is the same on both builds. The difference follows:

# diff x86iselp{2,3}.s 2c2 <_ _Phase2/Release/llvmCore-8.0.0-rc2.obj/lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86ISelLowering.cpp.o:_ _file format elf64-x86-64_ _---_ _> Phase3/Release/llvmCore-8.0.0-rc2.obj/lib/Target/X86/CMakeFiles/LLVMX86CodeGen.dir/X86ISelLowering.cpp.o: file format elf64-x86-64 121757c121757 < 863: 48 8b 84 24 e0 05 00 mov 0x5e0(%rsp),%rax_ _---_ _> 863: 48 8b 84 24 b0 01 00 mov 0x1b0(%rsp),%rax 121759c121759 < 86b: 48 33 84 24 b0 01 00 xor 0x1b0(%rsp),%rax_ _---_ _> 86b: 48 33 84 24 e0 05 00 xor 0x5e0(%rsp),%rax 121761,121762c121761,121762 < 873: 8b 8c 24 e8 05 00 00 mov 0x5e8(%rsp),%ecx_ _< 87a: 33 8c 24 b8 01 00 00 xor 0x1b8(%rsp),%ecx_ _---_ _> 873: 8b 8c 24 b8 01 00 00 mov 0x1b8(%rsp),%ecx > 87a: 33 8c 24 e8 05 00 00 xor 0x5e8(%rsp),%ecx

On Sat, Feb 9, 2019 at 9:54 AM Brian Cain <brian.cain at gmail.com> wrote: rc2 build on Ubuntu 16.04 saw a stage 2/3 mismatch on X86IselLowering.cpp.o -- I didn't try to build rc1 for 16.04 but I can try it now to see if it's there too.

I can pass along logs if anyone wants to investigate. On Thu, Feb 7, 2019 at 9:41 AM Hans Wennborg via Release-testers <_ _release-testers at lists.llvm.org> wrote:

Dear testers,

8.0.0-rc2 has been tagged from the release80 branch at r353413. Please run the test script, share your results, and upload binaries. I'll get the source tarballs and docs published as soon as possible, and binaries as they become available. Thanks, Hans

Release-testers mailing list Release-testers at lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/release-testers

-- -Brian

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